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<H3><A NAME="3_3_1">3.3.1 Plot extension modules</A></H3>
<P> To add plots to the graph you will need one or more of the following
 files plot extension files depending on what kind of graph you need to
 create.</P>
<UL>
<LI>jpgraph_log.php, Plot extension to support logarithmic X and Y
 scales</LI>
<LI>jpgraph_line.php, Plot extension. Needed to draw various line plots</LI>
<LI>jpgraph_date.php, Plot extension to handle date scales.</LI>
<LI>jpgraph_bar.php, Plot extension. Needed to draw various bar plots</LI>
<LI>jpgraph_error.php, Plot extension. Needed to draw various error
 plots</LI>
<LI>jpgraph_scatter.php, Plot extension. Needed to draw scatter and
 impulse plots.</LI>
<LI>jpgraph_spider.php, Plot extension. Needed to draw spider plots.</LI>
<LI>jpgraph_pie.php, Plot extension. Needed to draw Pie plots</LI>
<LI>jpgraph_pie3d.php, Plot extension. Needed to draw 3D Pie plots</LI>
<LI>jpgraph_gantt.php, Plot extension. Needed to create gantt plots</LI>
<LI>jpgraph_radar.php, Plot extension. Needed for radar plots</LI>
<LI>jpgraph_polar.php, Plot extension. Needed for Polar plots</LI>
<LI>jpgraph_gantt.php, Plot extension. Needed for Gantt charts</LI>
<LI>jpgraph_mgraph.php, Utility class to combine several graphs in the
 same image</LI>
<LI>jpgraph_regstat.php, Statistic extension. Needed to plot spline and
 bezier curves</LI>
<LI> jpgraph_stock.php, Plot extension. Needed to plot stock charts</LI>
<LI> jpgraph_antispam.php, Special extension to generate anti-spam
 images consisting of letters+images which are very hard to digitally
 read with an OCR program</LI>
<LI> jpgraph_gradient.php, Internal module. Contains all color gradient</LI>
<LI> jpgraph_gb2312.php, Handling of gb2312 font encoding (used for some
 Chinese fonts)</LI>
<LI> jpgraph_plotmark.inc, Handling of plotmarks in line and scatter
 plot.</LI>
<LI> jpgraph_iconplot.php, Handling icons (small images) that can be
 added to the plots</LI>
<LI> jpgraph_plotband.php, Handling of plotbands added to the graphs</LI>
<LI> jpgraph_flags.php, Handling of country flags used as plot marks or
 as backgrounds.</LI>
<LI> jpgraph_utils.php, Various utility function</LI>
<LI> imgdata_*.inc, Encoded images for plotmarks</LI>
<LI> flags*.dat, Image data for flags. Pre-compiled data for country
 flags.</LI>
<LI>jpgraph_canvas.php, Plot extension to make it possible to draw
 arbitrary graphic on a canvas.</LI>
<LI>jpgraph_canvtools.php, Add on to the canvas graph to provide an
 easier way to draw arbitrary shapes.</LI>
</UL>
<P> In the pro-version the following additional files are available</P>
<UL>
<LI> jpgraph_windrose.php, Windrose plot extension</LI>
<LI> jpgraph_odo.php, Odometer plot extension</LI>
<LI> jpgraph_barcode.php, Linear barcode extension</LI>
<LI> jpgraph_pdf417.php, PDF417 2-Dimensional Barcode extension</LI>
<LI> jpgraph_table.php, Creation of Excel like graphic tables</LI>
</UL>
<P></P>
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